Entanglement generation via diffraction
arXiv:1909.01354 · doi:10.1103/PhysRevA.100.042332
Abstract
Quantum entanglement is an important resource for next-generation technologies. We show that diffracting systems can supplant beam splitters, and more generally interferometric networks, for entanglement generation -- systems as simple as screens with pinholes can create entanglement. We then discuss the necessary and sufficient conditions for entanglement to be generated by states input to any passive linear interferometric network. Entanglement generated in free space can now be harnessed in quantum-optical applications ranging from quantum computation and communication to quantum metrology.
8 pages including 1 figure and 1 appendix
References in corpus (12)
- Experimental quantum teleportation
- Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
- Optical Quantum Computing
- Nonlinear atom interferometer surpasses classical precision limit
- Laguerre-Gaussian mode sorter
- Quantum metasurface for multi-photon interference and state reconstruction
- Entanglement by Path Identity
- Sorting photons by radial quantum number
- Quantum communication without alignment using multiple-qubit single-photon states
- Quantum-limited Euler angle measurements using anticoherent states
- Every entangled state provides an advantage in classical communication
- Nonclassical states that generate zero entanglement with a beam splitter